Ames engaged in manufacturing; served as a member of the common council of Lowell in 1896; like his father, he re-joined the Army during the Spanish–American War and was commissioned lieutenant and adjutant of the Sixth Regiment, Massachusetts Volunteer Infantry; appointed acting engineer officer of the Second Army Corps under General Graham, in addition to his duties as adjutant. He was promoted to lieutenant colonel in August 1898; served as civil administrator of the Arecibo district of Puerto Rico until November 1898.

Ames became a member of the Massachusetts House of Representatives 1897–1899; elected as a Republican to the Fifty-eighth and to the four succeeding Congresses (March 4, 1903 – March 3, 1913); was not a candidate for renomination in 1912; resumed manufacturing pursuits; president of United States Cartridge Company, and treasurer of Heinze Electrical Co. of Lowell; at time of death was treasurer and a director of Wamesit Power Co. of Lowell, Massachusetts; director of Union Land and Grazing Co., Colorado Springs, Colorado, and vice president and a director of Ames Textile in Lowell.

Butler Ames was completely taken with the Villa Balbianello when he visited Europe for the first time in 1912, and he determined to purchase the Villa. He succeeded in 1919, beautifully restoring the Villa. On a Dictaphone Tape he tells the story (also a short autobiography). The Tape was transcribed, and his greater family published it in book form: "Butler Ames and the Villa Balbianello, Lake Como, Italy, An American Oral History." Essays and introductions by Evelyn Ames, Pauline Ames Plimpton, Ezio Antonini, Sarah and George Plimpton plus period photographs and the illustrated Guest Book 1920 to 1970 was added. The book was edited by Oakes Plimpton and printed by Hobblebush Press, 2009, available through Amazon Books or Oakes Plimpton, 67 Coolidge Road, Arlington, MA 02476.

Ames died in Tewksbury, Massachusetts in 1954, at the age of 83. He is buried, along with his father, grandfather and extended family, in the Hildreth family cemetery, behind the main cemetery on Hildreth Street in Lowell.[2]

US1051659 The axis of rotation is traverse to the wind, the foundation of wind turbines with rotation axis traverse to the wind. Mr. Ames taught applications for kites, cars, load carrying, and using wind energy to do tasks, even for the lifting of aircraft. He taught airfoils from flat to curved. This teaching precedes Savonius.